Electronic cigarette



FIG. 1 is a perspective view showing our design;

FIG. 2 is another perspective view showing our design;

FIG. 3 is a front view showing our design;

FIG. 4 is a back view showing our design;

FIG. 5 is an enlarged top view showing our design;

FIG. 6 is an enlarged bottom view showing our design;

FIG. 7 is a left view showing our design; and,

FIG. 8 is a right view showing our design.

The broken lines in the drawings depict a portion of the electronic cigarette that form no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette, as shown and described. 